Cree XLamp XL 1 Watt LED Mounted on PCB

Cree XLamp XL 1 Watt LED mounted to PCB. These LEDs will need a current limit circuit and should be mounted to a heat sink (about 10 surface inches of heat sink per watt required).The PCB features: *1x1 inch *no electrical connection to bottom of board*two mounting holes for 4-40 screws (can be enlarged to 6-32 without structural problems *no solder mask on bottom for better heat transfer to a heat sink surface *can be connected series in groups, two power connections for each positive and negative pin, example